Does the sentence "Although it is not known exactly when Chopin first met Liszt after arriving in Paris, on 12 December 1831 he mentioned in a letter to his friend Woyciechowski that "I have met Rossini, Cherubini, Baillot, etc.—also Kalkbrenner." provide a valid answer to the question "Who was the recipient of Frédéric's letter he wrote on 12 December 1831?"

A: yes

Does the sentence "The Dutch written grammar has simplified over the past 100 years: cases are now mainly used for the pronouns, such as ik (I), mij, me (me), mijn (my), wie (who), wiens (whose: masculine or neuter singular), wier (whose: feminine singular; masculine, feminine or neuter plural)." provide a valid answer to the question "What's the Dutch word for "my"?"

A: yes

Does the sentence "A number of decoy towns were constructed in Somerset in World War II to protect Bristol and other towns, at night." provide a valid answer to the question "Why were decoy towns used in WW2"

A: yes

Does the sentence "Vostok 1 orbited the Earth for 108 minutes and made its reentry over the Soviet Union, with Gagarin ejecting from the spacecraft at 7,000 meters (23,000 ft), and landing by parachute." provide a valid answer to the question "How long did Yuri Gagarin orbit the earth in the spacecraft?"

A:
yes